The Moon passes 5° north of Uranus at 6 A.M. EDT this morning. You’ll find our satellite hanging above the Pleiades (M45) in ...

Even with a bright Moon in the sky, you can easily trace this “waterfall” of stars to its end in the spray of open cluster ...

A 1,100-mile-long ice cloud forms near the martian volcano Arsia Mons every morning. New simulations suggest it’s built by a ...

This small martian satellite, the mission target for MMX, is destined to be shredded, changing the Red Planet forever.

The Moon passes 5° north of Neptune at 11 P.M. EDT; you can catch the pair in the south around that time, along with Saturn in the southwest, just to the Moon’s lower left. Saturn is visible to the ...

Dione and its shadow cross Saturn’s disk this evening, while several more of the ringed planet’s moons stand nearby.

Saturn’s two-toned moon Iapetus is now passing south of the ringed planet, making this satellite easier than usual to find.

The nearly Full Moon passes 5° north of Neptune at 11 P.M. EDT, creating a celestial triangle with the ice giant and nearby gas giant Saturn. Our satellite and Neptune share the constellation Pisces, ...